Martyr Anodes CMT20M Tear Drop Magnesium Hull Anode 3.4" x 1.8" x 0.6"

The Martyr Anodes CMT20M is a tear drop shaped magnesium hull anode designed specifically for freshwater applications. This sacrificial anode protects your boat's underwater metal components from galvanic corrosion by corroding preferentially, extending the life of valuable hardware like props, shafts, rudders, and trim tabs.

Key Features:

• Tear drop design for streamlined installation on hull surfaces
• Magnesium alloy formulation optimized for freshwater use
• Compact dimensions: 3.4" length x 1.8" width x 0.6" height
• Provides reliable galvanic protection for underwater metals
• Easy to install and replace as part of routine maintenance

Important: Anode material selection is critical for proper corrosion protection. Use zinc anodes in saltwater, aluminum anodes in brackish water, and magnesium anodes like the CMT20M in freshwater environments. Using the wrong anode material can result in inadequate protection or accelerated corrosion.

Regular inspection and replacement of sacrificial anodes is essential for maintaining your boat's corrosion protection system. Replace anodes when they've corroded to approximately 50% of their original size.